Locomotive.



T. R. DAWSON.

LOGOMOTIVE.

APPLICATION FILED MAY 10, 1911.

Patented Mar. 26, 1912.

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LOCOMOTIVE- APPLICATION FILED my 10 1911.

Patented Mar. 26, 1912.

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T. R. DAWSON.

LOGQMOTIVE. APPLICATION FILED MAY 10, 1911.

Patented Mar. 26, 1912.

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T. R. DAWSON.

LOCOMOTIYE. APPLIOATION FILED MAY 10,' 1911.

1,021,455. Patented Mar. 26, 1912.

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UNITED srArEs PATENT OFFICE.

THOMAS RUSSEIlL DAWSON, OF BARNESBOItO, PENNSYLVANIA.

LOCOMOTIVE.

To all whom it may concern Be it known that I, THOMAS RUSSELL DAWSON, acitizen of the United States of America, residing at Barnesboro, in thecounty of Cambria and State of Pennsylvania, have invented certain newand useful Improvements in Locomotives, of which the following is aspecification, reference being had therein to the accompanying drawing.

This invention relates to locomotives, and the principal object of thesame is to provide means whereby the heated gases from the firebox areconducted to the boiler and thence to and through the tender to heat thewater therein, and returned to the body of the locomotive and dischargedinto the smoke stack.

In carrying out the object of the invention generally stated above, anovel system of fines is provided and said fiues include means wherebythe flow of heat may be cut off from the tender; means whereby the flowof heat through the tender may be regulated, and means for placing thefiues of the locomotive and the tender in communication, said meansbeing so constructed that the locomotive and tender can have the usualrelative movements such as are necessary traveling over curved portionsof a railroad.

A preferred and practical embodiment of the invention is shown in theaccompanying drawings, wherein:

Figure l is a vertical longitudinal sec tional view of a locomotiveconstructed in,

accordance with this invention. Fig. 2 is a horlzontal sectlonal vlewtaken on the line 22, Fig. 1. Fig. 3 1s a transverse vertical sectionalview taken on the line 33,

Fig. 1, looking toward the rear. Fig. 4 is a transverse vert calsectional vlew taken on the line 4-4, Flg. 1. Fig. 5 1s a transversevertical sectional view taken on the line 55, Fig. 1. Fig. 6 is atransverse verticalsectional view similar to Fig. 3, looking toward thefront of the locomotive. Fig. 7 is a top plan view of the flue-carryingcoupler for the tender and engine. Fig. 8 is a transverse verticalsectional view taken on the line 88, Fig. 7'. Fig. 9 is a'longitudinalvertical sectional view taken on the line 99, Fig. 7. Fig. 10 is atransverse Specification of Letters Patent.

Application filed May 10, 1911.

Patented Mar. 26, 1912.

Serial No. 626,297.

vertical sectional view taken on the line l010, Fig. 2. Fig. 11 is afragmentary detail top plan view of the flue plates of the engine andtender. Fig. 12 is a detail fragmentary sectional view showing theguiding means for the slidable flexible door at the rear of the tender.Fig. 13 is a fragmentary detail perspective view of the casing thatincloses the. mechanism for adjusting the flexible door of the tender.Fig. 14% is a fragmentary sectional view showing one of the flues and acontrolling door or damper therefor. Fig. 15 is a detail perspectiveview of the door or damper shown in Fig. 12. Figs. l6 and 17 are sideand end eleva-' tions, respectively, of hand leversfor operating theflue dampers.

The improved locomotive comprises the engine 18 and tender 19, which, sofar as general appearances are concerned, may be of the usual or anypreferred construction. The engine 18 is equipped with the usual boilershell 20 that incloses the boiler 21 in which heat-conducting tubes arearranged, said tubes being divided into upper and lower sets of tubes 22and 23 by the central partition plate 24. The forward end of the boilercarries a casing 25 that places the outer ends of the tubes 22 and 23 incom munication, said casing 25 being located within shell 20 and causesthe heated gases from the upper tubes to pass into the lower tubes 23.The fire box 26 has a forward bridge wall 27 and a casing is arranged infront of said wall. Said casing is divided into upper and lowercompartments 28 and 29'by the rear end of partition plate Qt. The upperset of tubes 22 extends into compartment 28 and said compartment has apassage 29 that communicates with the fire box 26. The lower set oftubes 28 communicates with the lower compartment 29. The fire box 26 isprovided with a grate 30 and below said grate with a hopper-shapedoutlet 31, the discharge from which is controlled by a pivotally mounteddoor 32. An operating rod 33 is provided for said door, said rodextending into the cab 34; and carrying a hand lever 35 that ispivotally mount-' ed on a stand 36.

The compartment 29 has its base portion in communication with passages37 that extend on opposite sides of the outlet 31 of the fire-box 26,and communicate with a reduced passage 38 that leads into a chamber 39formed in the base of the rear portion of the engine 18. Said chamber 39is provided with a semi-circular rear outlet 40 in its bottom.

The tender 19 has its water tank 41 divided into independent side andcentral longitudinal compartments 42 and 43 by the partition plates 44and each compartment is provided with tubes The ends of the tubes 45extend through the end walls of the tank 41. The forward end of thetender 19 has a base chamber 46 therein which extends lceneath theforward portion of the tank 41 and is in direct communication with theforward ends of the side compartments 42. At each side, the chamber 46is provided with a semi-circular outlet 47. Chamber 46 is centrallypartitioned to provide a circular casing 48 that is in directcommunication with the forward end of central com partment 43. Thebottom of casing 48 is provided with a semi-circular inlet opening 49.

A fine frame 50 connects the chamber 39 of the engine 18 with the casing48 of the tender 19. Said flue frame 50 is flat and has end openings 51through which the pivot studs 52 of the rear truck 53 of the engine andthe front truck 54 of the tender project, said studs pivotally engagingthe central openin s 55 of the chamber 39 and casing 48, so t iat thenecessary relative movements of the frame 50, engine 18 and tender 19are permitted, such as are necessary incidental to rounding curves.

The flue frame 50 is provided with a central longitudinal fine 56 havingan open forward end 57 that is at all. times in communication with thesemi-circular outlet 40 of chamber 39, and an open rear end 58 that isat all times in communication with the semi-circular inlet opening 49 ofcasing 48. Side fiues 59 extend longitudinally through frame 50 and.have their rear open ends 60 at all times in communication with thesemicircular side outlet openings 47 of the chamber 46 and their forwardopen ends 61 at all times in communication with the semicircular inletopenings 62 at the bottoms of the side fines 63 that surround chamberand which communicate with the arched flue 64 that surrounds the boilerand which has its open forward end 65 beneath the smoke stack 66. Thisarrangement of flues, causes the heat to normally circulate from thefirebox 26 through the upper set of boiler flues 32, thence through thelower setof boiler flues 33 to the chamber 39. From chamber 39, the heatflows through the central fine of frame 50 to and through the fines ofthe central compartment 43 of the tender 19 and returns through thetubes of the side compartments 42 and passes through the side fines ofsaid frame 50 and enters the side flues 63 of the engine 18 and passesthrough the arched flue 64 and escapes through the stack 66. By thismeans, the heated gases are caused to pass through the boiler twice andthrough the tank of the tender twice, thereby generating steam in theboiler and heating the water in the tank of the tender.

The top portion of the tender 19 is provided with a flat plate 67 thatforms the bottom of a coal bunker, and at one side of said bunker, acasing 68 is provided that incloses a sprocket chain 69 that connectsforward and rear sprockets 70 and 71. Forward sprocket 70 is mounted ona shaft 72, one end of which projects beyond the inner wall of casing 68and'is equipped with a crank handle 73 by means of which said shaft maybe manually rotated. The rear sprocket 71 is fast on a shaft 74 thatextends transversely across the rear of tender 19 adjacent and above'therear end of the tank 41. A drum 75 is fast on shaft 74 and has aflexible damper 76 wound thereon that is formed of a plurality of hingedsections. The damper 76 is slidable between guiding cleats 77 and therear end "of tank 41 and can be manually adjusted by manipulating crankhandle 73 so that it will close some, or all, of the rear ends of theflues that extend through the compartments of said tank.

The inner walls of fines 63 of the engine 18 have dampers 78 pivotallymounted therein which are operated by the rods 79 that connect with thecranks 80 of the hand levers 81 that are pivotally connected to thestands 82 in the cab 34.

It will be understood that by opening the dampers 78 and closing thedamper 76, drafts from the chamber 39 to the side flues 63 will becreated so that the heat from the firebox 26 instead of passing throughthe tender will pass from the said chamber 39, through flues 63 and 64to the stack 66. And as the levers which control the dampers 76 and 78are located within easy reach of the engineer and fireman, it will beclear that the manipulation of said dampers is facilitated.

From the foregoing description, it will be seen that this inventionprovides means whereby the circulation of heat through the boiler andwater tank is at all times under the control of the engineer andfireman, and that the arrangement of fiues in the engine and tender andthe flue frame which connects the same is such that the circulation ofheat through the boiler and tender can be continued irrespective of therelative positions of said tender and engine.

What I claim as my invention is 1. A locomotive comprising an engineprovided with a fire box and boiler, said boiler being provided withupper and lower sets of conducting passages for heated gases, means fordelivering heat from the fire box to the upper passages of the boiler,means for conducting heat from the upper passages to the lower passages,a chamber in the engine provided with an outlet, a stack for the engine,fines surrounding the chamber and communicating withv said stack, atender provided with a water tank, means for dividing said tank intoindependent heatconducting compartments, a casing in said tender andprovided with a bottom inlet opening, said casing being provided with anoutlet that communicates with one of said compartments and inlets thatcommunicate with the other compartments, said casing being provided witha bottom inlet, and a fine frame pivotally connecting the engine andtender and provided with fines for placing the side fines of the enginein communication with the bottom outlets of the tender chamber and afine for placing the outlet of the engine chamber in communication withthe bottom inlet of the tender casing.

2. A locomotive comprising an engine provided with heat-circulating anddischarging fiues, a tender provided with heat-circulating means, meanspivotally connected to the engine and tender and provided with a finefor placing the circulating fines of the engine in communication withthe heat-circulating means of the tender and with fines for conduct-ingthe heat from the tender to the discharging fines of the engine, adamper for preventing heat passing through the circulating means of thetender, and dampers for placing the circulating fines of the engine indirect communication with the discharging flues.

3. A locomotive comprising an engine provided with a firebox and boiler,upper and lower independent heat-conducting means in the boiler, achamber in the engine receiving the heat from the lower heat-conduct-ingmeans, independent heat-discharging means in the engine, a tenderprovided wit-h a water tank, means for circulating heat through saidtank, and a heat conductor pivotally connected to the engine and tenderand provided with means for placing the chamber in communication withthe heat-circulating means of the tender and said circulating means incommunication with the heat discharging means.

4:. A locomotive comprising an engine provided with heat-circulatingfines and independent discharge fines, dampers controlling thecommunication between said fines, manually-controlled means foroperating said dampers, a tender provided with heat-circulating fines,manually-operating means for controlling the circulation through thetender fiues, and means for placing the circulation fines and dischargefines of'the engine in communication with the fines of the tender.

5. A locomotive comprising an engine provided with boiler-heating finesand independent heat-discharging fines, a tender provided with a watertank, means for dividing the water tank into independent heat passages,a casing provided with outlets that communicate with two of saidpassages and an independent inlet that communicates with one of saidpassages, and a heat conductor pivotally connected to the engine andtender and provided with a fine for connecting the heating fines of theengine with the inlet of said casing and independent fines forconnecting the outlets of said casing with the said discharging fines.

6. A locomotive comprising an engine provided with a firebox and boiler,means for dividing said boiler into upper and lower heat passages, meansfor conducting heat from the firebox to the upper heat passages, achamber, means for conducting heat from the lower passages to saidchamber, discharge fines in said engine, a tender provided withheat-circulating means, and means for placing the said chamber incommunication with said heat-circulating means and said heat-circulatingmeans in communication with said discharge flues.

7 A locomotive comprising an engine provided with independent heatcirculating and discharge flues a tender provided with heat circulatingfiues, a fine frame provided with, end openings, means in said openingsfor pivotally connecting said frame to the tender, and engine, andindependent fiues in said frame for placing the circulating fines of theengine in communication with the circulating fines of the tender andsaid tender fines in communication with the discharge fines of theengine. 8. A locomotive comprising an engine provided with heatcirculating and dis- F I I charge fines, means for connecting saidfines, a tender provided with heat circulating means, means pivotallyconnected to the engine and tender and provided with a fine for placingthe circulating fines of the engine in communication with the heatcirculating means of the tender and with fiues for conducting the heatfrom the tender to the discharge fines in the engine and means forpreventing circulation of heat in said tender.

9. A locomotive comprising an engine provided with a fire box andboiler, said boiler being provided with upper and lower sets ofconducting passages for heated gases, means for delivering heated gasesfrom the fire box to the upper passages of the boiler, means forconducting heat from the upper passages to the lower passages, a tenderprovided with a water tank, means for dividing said tank intoindependent heat conducting compartments, and a flue frame pivotallyconnecting the engine and the tender.

In testimony whereof I hereunto atfix my signature in presence of twowitnesses.

THOMAS RUSSELL DAVSON.

VVit-nesses THOMAS RUSSELL, ROBERT RUSSELL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

